It's about evaporative cooling. Read about how cooling towers work in nuclear and coal plants. The principle is the same for the data centers, but it the wasteh

It's about evaporative cooling. Read about how cooling towers work in nuclear and coal plants. The principle is the same for the data centers, but it the wasteheat to get rid of comes from computation. They obviously shouldn't be doing it like that, but since clean water is cheap and business in absence of reason optimizes for lowest costs that's exactly what they did.